EP 4184015 A1 20230524 - HYDRAULIC DRIVE SYSTEM
Title (en)
HYDRAULIC DRIVE SYSTEM
Title (de)
HYDRAULISCHES ANTRIEBSSYSTEM
Title (fr)
SYSTÈME D'ENTRAÎNEMENT HYDRAULIQUE
Publication
Application
Priority
- JP 2020120627 A 20200714
- JP 2021024489 W 20210629
Abstract (en)
This hydraulic drive system includes: a hydraulic pump capable of changing a discharge flow rate of a working fluid; a meter-in control valve that controls a meter-in flow rate of the working fluid flowing from the hydraulic pump to a hydraulic actuator; a meter-out control valve that is provided separately from the meter-in control valve and controls a meter-out flow rate of the working fluid being drained from the hydraulic actuator into a tank; an operation device that outputs an operation command; a first pressure sensor that detects a drainage pressure of the hydraulic actuator; and a control device that sets a target meter-out flow rate according to the operation command from the operation device and controls an opening degree of the meter-out control valve on the basis of the drainage pressure detected by the first pressure sensor and the target meter-out flow rate.
IPC 8 full level
F15B 11/044 (2006.01); E02F 9/22 (2006.01); F15B 11/02 (2006.01); F15B 11/028 (2006.01); F15B 11/042 (2006.01)
CPC (source: EP US)
E02F 9/2004 (2013.01 - US); E02F 9/2203 (2013.01 - US); E02F 9/2228 (2013.01 - EP); E02F 9/2235 (2013.01 - EP); E02F 9/2271 (2013.01 - US); E02F 9/2296 (2013.01 - US); F15B 11/042 (2013.01 - EP US); F15B 11/044 (2013.01 - EP US); F15B 11/165 (2013.01 - EP); F15B 21/087 (2013.01 - EP); F15B 2211/20515 (2013.01 - EP); F15B 2211/20523 (2013.01 - EP); F15B 2211/20546 (2013.01 - EP); F15B 2211/30565 (2013.01 - EP); F15B 2211/30575 (2013.01 - EP); F15B 2211/3059 (2013.01 - EP); F15B 2211/3111 (2013.01 - EP); F15B 2211/322 (2013.01 - EP); F15B 2211/327 (2013.01 - EP); F15B 2211/351 (2013.01 - EP); F15B 2211/353 (2013.01 - EP); F15B 2211/6306 (2013.01 - EP); F15B 2211/6309 (2013.01 - EP); F15B 2211/6313 (2013.01 - EP); F15B 2211/6346 (2013.01 - EP); F15B 2211/6652 (2013.01 - EP); F15B 2211/6654 (2013.01 - EP); F15B 2211/6656 (2013.01 - EP); F15B 2211/7053 (2013.01 - EP); F15B 2211/75 (2013.01 - EP); F15B 2211/755 (2013.01 - EP); F15B 2211/8609 (2013.01 - EP)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
Designated validation state (EPC)
KH MA MD TN
DOCDB simple family (publication)
EP 4184015 A1 20230524; CN 115461545 A 20221209; JP 2022017833 A 20220126; US 2023265865 A1 20230824; WO 2022014315 A1 20220120
DOCDB simple family (application)
EP 21841588 A 20210629; CN 202180033864 A 20210629; JP 2020120627 A 20200714; JP 2021024489 W 20210629; US 202118005111 A 20210629